CN112060925B - Whole vehicle control method and system of extended range vehicle - Google Patents

Whole vehicle control method and system of extended range vehicle Download PDF

Info

Publication number
CN112060925B
CN112060925B CN202010943663.2A CN202010943663A CN112060925B CN 112060925 B CN112060925 B CN 112060925B CN 202010943663 A CN202010943663 A CN 202010943663A CN 112060925 B CN112060925 B CN 112060925B
Authority
CN
China
Prior art keywords
vehicle
power
battery pack
power battery
temperature environment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010943663.2A
Other languages
Chinese (zh)
Other versions
CN112060925A (en
Inventor
刘德春
刘庆勃
孙昊
林元则
韦健林
蔡文远
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Geely Holding Group Co Ltd
Zhejiang Geely New Energy Commercial Vehicle Group Co Ltd
Geely Sichuan Commercial Vehicle Co Ltd
Jiangxi Geely New Energy Commercial Vehicle Co Ltd
Original Assignee
Zhejiang Geely Holding Group Co Ltd
Zhejiang Geely New Energy Commercial Vehicle Group Co Ltd
Geely Sichuan Commercial Vehicle Co Ltd
Jiangxi Geely New Energy Commercial Vehicle Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Geely Holding Group Co Ltd, Zhejiang Geely New Energy Commercial Vehicle Group Co Ltd, Geely Sichuan Commercial Vehicle Co Ltd, Jiangxi Geely New Energy Commercial Vehicle Co Ltd filed Critical Zhejiang Geely Holding Group Co Ltd
Priority to CN202010943663.2A priority Critical patent/CN112060925B/en
Publication of CN112060925A publication Critical patent/CN112060925A/en
Application granted granted Critical
Publication of CN112060925B publication Critical patent/CN112060925B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Abstract

The invention provides a whole vehicle control method and a whole vehicle control system of a range-extended vehicle. The vehicle control method comprises the following steps: judging whether the vehicle has a driving requirement under the condition of meeting a preset limit low-temperature environment condition, if so, controlling the whole vehicle according to a limit low-temperature environment driving strategy of generating power by using a range extender of the vehicle and heating a power battery pack by using a thermal management system; and if not, controlling the whole vehicle according to a limit low-temperature environment heating strategy for heating the power battery pack by using the range extender and the thermal management system together. According to the scheme of the invention, the driving capability of the vehicle at any time under the extreme low-temperature environment condition is ensured, the time for heating the power battery pack is greatly shortened, a special warm warehouse is not required to be built for the vehicle, the heating time for the power battery pack to reach the available temperature is greatly shortened, and the normal driving of the vehicle is ensured.

Description

Whole vehicle control method and system of extended range vehicle
Technical Field
The invention relates to the technical field of extended range vehicles, in particular to a whole vehicle control method and a whole vehicle control system of an extended range vehicle.
Background
At present, energy is in short supply and pollution is serious, the development of renewable energy becomes inevitable, and a new energy automobile has the advantages of zero emission, no pollution and the like, but the factors of the battery driving range, the limited coverage area of a charging pile, the high price of the battery and the like greatly limit the large-scale popularization of the pure electric automobile. The range extending automobile is a pure electric automobile with a range extender (an auxiliary power device consisting of an engine, a generator and a rectifying device), when the electric quantity of a power battery is sufficient, the range extender is closed, and the whole automobile is in a pure electric working mode. When the electric quantity of the power battery is insufficient, the range extender is opened, the range extender is switched to the target power requirement and is used for assisting in driving the whole vehicle, the whole vehicle enters a range extension mode, and the range extender is used for generating electricity to charge the storage battery or directly drive the motor, so that the driving range of the electric vehicle is increased.
Because the charge and discharge capacity of the high-voltage battery pack is influenced by temperature, particularly under the extreme low-temperature environment (the temperature of the battery core is lower than-10 ℃), the charge and discharge capacity of the battery is greatly attenuated, and the battery core can recover the normal discharge capacity and the whole vehicle can normally run only when the temperature of the battery core rises to above 0 ℃.
In order to ensure the normal running of the vehicle in the extreme low-temperature environment, the current technical scheme mainly comprises the following two steps: 1) and a special vehicle parking warm house is built, and the ambient temperature of the warm house is ensured by using the warm air. When the vehicle is not in use, the vehicle is parked in the warm garage. This solution requires, on the one hand, additional construction and energy costs and, on the other hand, limits the popularity and spread of new energy vehicles for the average consumer. 2) Before the vehicle runs, the high-voltage battery pack is heated by using a heating device such as a PTC (positive temperature coefficient) of the thermal management system, and the vehicle is driven to run after the temperature of the battery core rises to a certain temperature. In the scheme, the discharging capacity of the battery cell is very small in the extreme low-temperature environment, so that a long time is needed when the PTC is used for heating, a driver needs to wait for a period of time, and the new energy vehicle can run, so that the capacity of the new energy vehicle for using at any time is limited.
Disclosure of Invention
The invention aims to solve the technical problem that the charging and discharging capacity of a high-voltage battery pack of a new energy vehicle is influenced by temperature under the extreme low-temperature environment so as to influence the normal running of the whole vehicle in the prior art.
A further object of the present invention is to achieve normal driving of a vehicle in a very low temperature environment without increasing hardware and mechanical complexity.
Particularly, the invention provides a whole vehicle control method of an extended range vehicle, which comprises the following steps:
judging whether the vehicle has a driving demand under the condition of meeting the preset limit low-temperature environment condition,
if so, controlling the whole vehicle according to a limit low-temperature environment driving strategy of generating power by using a range extender of the vehicle and heating a power battery pack by using a thermal management system;
and if not, controlling the whole vehicle according to a limit low-temperature environment heating strategy for heating the power battery pack by using the range extender and the thermal management system together.
Optionally, the extreme low temperature ambient heating strategy comprises the steps of:
starting the range extender and enabling the range extender to be in accordance with a first power P1Generating electricity;
and starting the thermal management system, and heating the power battery pack by utilizing the range extender and the thermal management system together.
Optionally, when the electric quantity of the power battery is less than or equal to a preset maximum value, the first power P is obtained by calculating according to the following formula1：
P1＝Pr*IF1Wherein P isrFor the rated power, IF, of the thermal management system1Is a pre-calibrated influence factor, and IF1＞1；
When the electric quantity of the power battery is larger than the preset highest value, according to P1＝PrCalculating to obtain the first power P1。
Optionally, the extreme low-temperature environment driving strategy includes the following steps:
starting the range extender and enabling the range extender to be in accordance with a second power P2Generating electricity;
limiting the vehicle to the maximum speed VspdDriving;
starting the thermal management system, and heating a power battery pack by using the thermal management system.
Optionally, the second power P is obtained by calculation according to the following formula2：
P2＝P1+P0*IF2Wherein P is0Is the average power consumption of the drive motor of the vehicle, IF2Is a pre-calibrated influence factor.
Optionally, in the step of determining whether the vehicle has a driving demand under the condition of the extreme low-temperature environment, if all of the following conditions are met, it is determined that the vehicle has the driving demand, otherwise, it is determined that the vehicle does not have the driving demand:
the opening degree of the accelerator pedal is greater than a preset opening degree, and the duration time is greater than the preset time;
the whole vehicle READY indicator lamp is lightened;
the actual gear is in forward or reverse.
Optionally, in the step of determining whether the vehicle has a driving demand when the limit low-temperature environment condition is met, if all of the following conditions are met, it is determined that the limit low-temperature environment condition is met, otherwise, it is determined that the limit low-temperature environment condition is not met:
the continuous discharge power of the power battery pack is less than a first preset power threshold value P3；
The electric quantity of the power battery pack is smaller than a first preset electric quantity threshold value;
the lowest temperature of the power battery pack is lower than a first preset temperature.
Optionally, in the process of controlling the whole vehicle by using the extreme low-temperature environment driving strategy or the extreme low-temperature environment heating strategy, whether the whole vehicle meets any one of the following conditions is judged, and if yes, the extreme low-temperature environment condition is exited:
the READY indicator light of the whole vehicle is turned off;
the continuous discharge power of the power battery pack is greater than a second preset power threshold value P4；
The electric quantity of the power battery pack is greater than a second preset electric quantity threshold value;
the lowest temperature of the power battery is higher than a second preset temperature.
Optionally, the vehicle control method further includes the following steps:
under the condition that the limit low-temperature environment condition is not met, controlling the starting and stopping of the range extender according to a conventional working condition;
optionally, the controlling the start and the stop of the range extender according to the normal working condition includes the following steps:
when the electric quantity of the power battery pack is lower than a third preset electric quantity threshold value, starting the range extender, wherein the power of the range extender is increased along with the reduction of the electric quantity of the power battery pack;
and when the electric quantity of the power battery pack is higher than a fourth preset electric quantity threshold value, stopping running the range extender.
Particularly, the invention also provides a whole vehicle control system of the extended range vehicle, which comprises the following components: the control device comprises a memory and a processor, wherein a control program is stored in the memory, and the control program is used for realizing the whole vehicle control method when being executed by the processor.
According to the scheme of the invention, the range extender is started to generate power under the condition of the extreme low-temperature environment when the driving requirement exists, the power generation power of the range extender is utilized to ensure the driving capability of the vehicle at any time under the condition of the extreme low-temperature environment, the range extender and the thermal management system are started when the driving requirement does not exist, and the range extender and the thermal management system are utilized to heat the power battery pack together, so that the heating time of the power battery pack is greatly shortened. According to the scheme, a special warm warehouse is not required to be built for the vehicle, the heating time for the power battery pack to reach the available temperature is greatly shortened, and the normal driving of the vehicle is ensured.
In addition, the scheme does not need to increase a hardware structure, and the existing hardware structure of the extended range type vehicle is directly utilized to realize the normal running of the vehicle under the condition of the extreme low-temperature environment. The test verification cost of the whole vehicle control system is low, and only the software layer needs to be changed and verified aiming at the existing scheme.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily to scale. In the drawings:
fig. 1 shows a schematic flow chart of a vehicle control method of an extended range vehicle according to an embodiment of the invention;
fig. 2 shows a schematic flowchart of an entire vehicle control method of an extended range vehicle according to another embodiment of the invention;
fig. 3 shows a schematic configuration diagram of the range extended vehicle;
FIG. 4 is a schematic block diagram of an overall vehicle control system of an extended range vehicle according to one embodiment of the present invention;
in the figure: the method comprises the following steps of 1-driving a motor, 2-motor controller, 3-thermal management system, 4-power battery pack, 5-generator controller, 6-generator, 7-engine, 8-range extender controller, 9-engine controller, 10-judgment unit and 11-vehicle controller.
Detailed Description
Fig. 1 shows a schematic flowchart of a whole vehicle control method of an extended range vehicle according to an embodiment of the present invention. As shown in fig. 1, the vehicle control method includes:
step S100, judging whether the vehicle has a driving demand under the condition of meeting the limit low-temperature environment condition,
if so, entering a limit low-temperature environment driving strategy of generating power by using a range extender of the vehicle and heating a power battery pack by using a thermal management system;
if not, entering a limit low-temperature environment heating strategy for jointly heating the power battery pack by using the range extender and the thermal management system;
and S200, controlling the whole vehicle by utilizing a limit low-temperature environment driving strategy or a limit low-temperature environment heating strategy.
It is understood that, in step S200, when the determination in step S100 is yes, the entire vehicle is controlled by the extreme low-temperature environment driving strategy, and when the determination in step S100 is no, the entire vehicle is controlled by the extreme low-temperature environment heating strategy. In step S100, the power battery pack is a high voltage battery pack.
According to the scheme of the embodiment of the invention, the range extender is started to generate power under the condition of the extreme low-temperature environment when the driving requirement exists, the driving capacity of the vehicle under the condition of the extreme low-temperature environment at any time is ensured by utilizing the power generation power of the range extender, the range extender and the thermal management system are started when the driving requirement does not exist, and the range extender and the thermal management system are utilized to heat the power battery pack together, so that the time for heating the power battery pack is greatly shortened. The scheme does not need to build a special warm garage for the vehicle, greatly shortens the heating time of the power battery pack reaching the available temperature, and ensures the normal driving of the vehicle.
Fig. 2 shows a schematic flowchart of an entire vehicle control method of an extended range vehicle according to another embodiment of the present invention. As shown in fig. 2, in step S100, the extreme low-temperature environment heating strategy includes:
step S110, starting the range extender and enabling the range extender to be in accordance with the first power P1Generating electricity;
step S120, starting the thermal management system, and heating the power battery pack by using the range extender and the thermal management system together.
In step S110, the first power P1The calculation mode of (2) is related to the electric quantity of the power battery pack. When the electric quantity of the power battery is less than or equal to a preset maximum value, calculating to obtain a first power P according to the following formula1：
P1＝Pr*IF1Wherein P isrFor the rated power, IF, of thermal management systems1For influencing factors determined by real vehicle calibration, and IF1＞1；
When the electric quantity of the power battery is greater than a preset maximum value, according to P1＝PrCalculating to obtain a first power P1。
In step S100, the extreme low temperature environment driving strategy includes:
step S130, starting the range extender and enabling the range extender to be in accordance with the second power P2Generating electricity;
step S140, limiting the whole vehicle to the maximum vehicle speed VspdDriving;
and step S150, starting a thermal management system, and heating the power battery pack by using the thermal management system.
In step S130, the second power P is calculated according to the following formula2：P2＝P1+P0*IF2Wherein P is0For average power consumption of the drive motor of the vehicle, IF2Is a pre-calibrated influence factor.
Wherein the maximum vehicle speed VspdAnd IF2Are all determined by real vehicle calibration.
In step S100, if all of the following conditions are satisfied, it is determined that the vehicle has a driving demand, otherwise, it is determined that the vehicle does not have a driving demand:
1) the opening degree of the accelerator pedal is greater than a first preset opening degree, and the duration time is greater than a first preset time;
2) the whole vehicle READY indicator lamp is lightened;
3) the actual gear is in forward or reverse.
Meanwhile, if the opening degree of the accelerator pedal is smaller than a second preset opening degree and the duration time is longer than a second preset time, it is determined that the vehicle does not have a driving demand.
The first preset opening degree, the first preset time, the second preset opening degree and the second preset time are corresponding condition thresholds and can be determined through whole vehicle calibration in a low-temperature environment.
In step S100, if all of the following conditions are satisfied, it is determined that the extreme low-temperature environmental condition is satisfied, otherwise, it is determined that the extreme low-temperature environmental condition is not satisfied:
1) the continuous discharge power of the power battery pack is less than a first preset power threshold value P3；
2) The electric quantity of the power battery pack is smaller than a first preset electric quantity threshold value;
3) the lowest temperature of the power battery pack is lower than a first preset temperature.
Wherein the first predetermined power threshold P3The first preset electric quantity threshold value and the first preset temperature are corresponding condition threshold values and can be determined through whole vehicle calibration in a low-temperature environment.
In step S200, it is continuously determined whether the entire vehicle meets any one of the following conditions, and if so, the vehicle exits from the extreme low-temperature environment condition:
1) the READY indicator light of the whole vehicle is turned off;
2) the continuous discharge power of the power battery pack is larger than a second preset power threshold value P4；
3) The electric quantity of the power battery pack is greater than a second preset electric quantity threshold value;
4) the lowest temperature of the power battery is higher than a second preset temperature.
Wherein the second predetermined power threshold P4The second preset electric quantity threshold value and the second preset temperature can be determined through whole vehicle calibration in a low-temperature environment.
The vehicle control method further comprises the following steps:
and step S300, controlling the starting and stopping of the range extender according to the conventional working condition under the condition that the limit low-temperature environment condition is not met.
In step S300, it includes the steps of: when the electric quantity of the power battery pack is lower than a third preset electric quantity threshold value, starting the range extender, wherein the power of the range extender is increased along with the reduction of the electric quantity of the power battery pack; and when the electric quantity of the power battery pack is higher than a fourth preset electric quantity threshold value, stopping running the range extender.
The third preset electric quantity threshold and the fourth preset electric quantity threshold are thresholds under corresponding conditions, and can be determined through vehicle calibration under an extreme low-temperature environment.
According to the scheme of the invention, when the temperature of the power battery pack rises to a certain value, the whole vehicle control method can stop the operation of the range extender, ensure that the whole vehicle can have certain pure electric endurance in a conventional environment, and meet the use requirements of short-distance commuter customers.
Fig. 3 shows a schematic configuration diagram of the extended range vehicle. As shown in fig. 3, the vehicle control unit 11 controls the driving motor 1 through the motor controller 2 so that the vehicle can normally run. The power battery pack 4 provides pure electric running energy, and the range extender controller 8, the engine controller 9, the generator controller 52, the generator 6 and the engine 7 form a range extender system together. The vehicle control unit 11 can provide an additional energy source by controlling the range extender to generate power. The vehicle control unit 11 may also control the start and stop of the thermal management system 3.
Fig. 4 is a schematic structural block diagram of a vehicle control system of the extended range vehicle according to an embodiment of the present invention. The whole vehicle control system corresponds to the whole vehicle control method one by one. As shown in fig. 3, the vehicle control system includes a determination unit 10 and a controller. The determination unit 10 is used for determining whether the vehicle has a driving demand when the limit low-temperature environment condition is satisfied. The controller is a vehicle controller 11, and is configured to, when the determination result of the determination unit 10 is yes, control the entire vehicle by using a range extender of the vehicle to generate power and by using a limit low-temperature environment driving strategy of the thermal management system 3 to heat the power battery pack 4, and when the determination result of the determination unit 10 is no, control the entire vehicle by using the range extender and the thermal management system 3 to jointly heat the limit low-temperature environment heating strategy of the power battery pack 4.
According to the scheme of the invention, the existing hardware structure of the extended range vehicle is directly utilized to realize the normal running of the vehicle under the condition of extreme low-temperature environment without increasing the hardware structure. The test verification cost of the whole vehicle control system is low, and the existing scheme only needs to be changed and verified on a software layer.
The controller of the vehicle control system is configured to start the range extender and enable the range extender to operate according to the first power P1Power is generated, the thermal management system 3 is started, and the power battery pack 4 is heated by the range extender and the thermal management system 3 together. When the electric quantity of the power battery is less than or equal to a preset maximum value, calculating to obtain a first power P according to the following formula1：
P1＝Pr*IF1Wherein, PrFor the rated power, IF, of the thermal management system 31Is a pre-calibrated influence factor, and IF1＞1；
When the electric quantity of the power battery is greater than a preset maximum value, according to P1＝PrCalculating to obtain a first power P1。
The controller of the vehicle control system is configured to start the range extender and enable the range extender to work according to the second power P2Generating power and limiting the vehicle to the maximum speed VspdAnd the vehicle runs, the thermal management system 3 is started, and the thermal power battery pack 4 is heated by the thermal management system 3. Wherein, the second power P is obtained by calculation according to the following formula2：
P2＝P1+P0*IF2Wherein, P0Average power consumption, IF, of a drive motor 1 of a vehicle2Is a pre-calibrated influence factor.
Other characteristics of the whole vehicle control system correspond to those of the whole vehicle control method one to one, and are not described herein again.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims (8)

1. A whole vehicle control method of a range-extended vehicle is characterized by comprising the following steps:
judging whether the vehicle has a driving requirement or not under the condition of meeting the preset limit low-temperature environment condition,
if so, controlling the whole vehicle according to a limit low-temperature environment driving strategy of generating power by using a range extender of the vehicle and heating a power battery pack by using a thermal management system;
if not, controlling the whole vehicle according to a limit low-temperature environment heating strategy for heating the power battery pack by using the range extender and the thermal management system together;
the extreme low temperature environment heating strategy comprises the following steps:
starting the range extender and enabling the range extender to be in accordance with a first power P1Generating electricity;
starting the thermal management system, and heating the power battery pack by using the range extender and the thermal management system together;
when the electric quantity of the power battery is smaller than or equal to a preset maximum value, calculating and obtaining the first power P according to the following formula1：
P1＝Pr*IF1Wherein, PrFor the rated power, IF, of the thermal management system1Is a pre-calibrated influence factor, and IF1＞1；
When the electric quantity of the power battery is larger than the preset highest value, according to P1＝PrCalculating to obtain the first power P1。
2. The vehicle control method according to claim 1, wherein the extreme low-temperature environment driving strategy comprises the steps of:
starting the range extender and enabling the range extender to accord with a second power P2Generating electricity;
limiting the vehicle to the maximum speed VspdDriving;
starting the thermal management system, and heating a power battery pack by using the thermal management system.
3. The vehicle control method according to claim 2, wherein the second power P is calculated and obtained according to the following formula2：
P2＝P1+P0*IF2Wherein P is0Is the average power consumption of the drive motor of the vehicle, IF2Is a pre-calibrated influence factor.
4. The vehicle control method according to any one of claims 1-3, wherein in the step of determining whether the vehicle has the running demand under the extreme low-temperature environmental condition, if all of the following conditions are met, it is determined that the vehicle has the running demand, otherwise it is determined that the vehicle does not have the running demand:
the opening degree of the accelerator pedal is greater than a preset opening degree, and the duration time is greater than the preset time;
the whole vehicle READY indicator lamp is lightened;
the actual gear is in forward or reverse.
5. The vehicle control method according to any one of claims 1 to 3, wherein in the step of determining whether the vehicle has a driving demand when the limit low-temperature environment condition is satisfied, if all of the following conditions are satisfied, it is determined that the limit low-temperature environment condition is satisfied, otherwise it is determined that the limit low-temperature environment condition is not satisfied:
the continuous discharge power of the power battery pack is less than a first preset power threshold value P3；
The electric quantity of the power battery pack is smaller than a first preset electric quantity threshold value;
the lowest temperature of the power battery pack is lower than a first preset temperature.
6. The vehicle control method according to any one of claims 1 to 3, wherein in the process of controlling the whole vehicle by using the extreme low-temperature environment driving strategy or the extreme low-temperature environment heating strategy, whether the whole vehicle meets any one of the following conditions is judged, and if so, the extreme low-temperature environment condition is exited:
the READY indicator light of the whole vehicle is turned off;
the continuous discharge power of the power battery pack is greater than a second preset power threshold value P4；
The electric quantity of the power battery pack is greater than a second preset electric quantity threshold value;
the lowest temperature of the power battery is higher than a second preset temperature.
7. The vehicle control method according to claim 6, further comprising the steps of:
under the condition that the limit low-temperature environment condition is not met, controlling the starting and stopping of the range extender according to a conventional working condition;
optionally, the controlling the start and the stop of the range extender according to the normal working condition includes the following steps:
when the electric quantity of the power battery pack is lower than a third preset electric quantity threshold value, starting the range extender, wherein the power of the range extender is increased along with the reduction of the electric quantity of the power battery pack;
and when the electric quantity of the power battery pack is higher than a fourth preset electric quantity threshold value, stopping running the range extender.
8. A vehicle control system of an extended range vehicle, comprising:
a control device comprising a memory and a processor, the memory having stored therein a control program, the control program when executed by the processor being for implementing a vehicle control method according to any one of claims 1 to 7.
CN202010943663.2A 2020-09-09 2020-09-09 Whole vehicle control method and system of extended range vehicle Active CN112060925B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010943663.2A CN112060925B (en) 2020-09-09 2020-09-09 Whole vehicle control method and system of extended range vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010943663.2A CN112060925B (en) 2020-09-09 2020-09-09 Whole vehicle control method and system of extended range vehicle

Publications (2)

Publication Number Publication Date
CN112060925A CN112060925A (en) 2020-12-11
CN112060925B true CN112060925B (en) 2022-06-24

Family

ID=73663287

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010943663.2A Active CN112060925B (en) 2020-09-09 2020-09-09 Whole vehicle control method and system of extended range vehicle

Country Status (1)

Country Link
CN (1) CN112060925B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112590567A (en) * 2020-12-23 2021-04-02 天津易众腾动力技术有限公司 Method for providing electricity for whole vehicle in range-extended electric vehicle non-high-voltage state
CN112677776B (en) * 2021-01-13 2022-08-09 天津易众腾动力技术有限公司 Power safety control method for range-extending system of range-extending electric automobile

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5417868B2 (en) * 2009-02-03 2014-02-19 日産自動車株式会社 Control device for electric vehicle
CN202703306U (en) * 2012-08-14 2013-01-30 高春雷 Range extending device for electric vehicle
CN104149776B (en) * 2014-08-27 2016-06-22 安徽江淮汽车股份有限公司 A kind of hybrid vehicle system and control method thereof
CN105922984A (en) * 2016-04-22 2016-09-07 北京新能源汽车股份有限公司 Hybrid electric vehicle, and method and device for controlling power system thereof
CN108215812B (en) * 2017-12-29 2020-07-28 潍柴动力股份有限公司 Method and device for starting vehicle at low temperature
CN108248398B (en) * 2018-01-16 2020-10-27 浙江吉利新能源商用车有限公司 Control method and control system for power battery of extended range vehicle
CN111469714B (en) * 2020-04-24 2021-12-07 上海元城汽车技术有限公司 Starting control method, device, equipment and storage medium of extended range electric vehicle

Also Published As

Publication number Publication date
CN112060925A (en) 2020-12-11

Similar Documents

Publication Publication Date Title
US8242737B2 (en) Motor-driven vehicle
US10160307B2 (en) System and method for controlling motor temperature for green car
US9834200B2 (en) Vehicle and method of controlling vehicle
US20160229411A1 (en) Power storage system
US10017055B2 (en) Method for controlling air conditioner based on energy flow mode of vehicle
CN111409502B (en) Hydrogen fuel cell automobile and motor energy management method thereof in low-temperature environment
CN112060925B (en) Whole vehicle control method and system of extended range vehicle
US9151242B2 (en) Apparatus for controlling engine warming-up
WO2008023245A2 (en) Battery control system and battery control method
US20130270249A1 (en) Apparatus and method for controlling vehicle
US20150174984A1 (en) Method of controlling heating of hybrid electric vehicle
CN112428881B (en) Battery heating method and heating system for hybrid vehicle
US10538175B2 (en) Apparatus for controlling charging of environment-friendly vehicle, system including the same, and method thereof
US20150210284A1 (en) Driving environment estimation apparatus and method thereof
KR20220000028A (en) Method for controlling generator of vehicle
EP3805035A1 (en) Power battery heating system and method using solar sunroof energy
KR20140068556A (en) Control method of DC-DC converter for electric vehicle
CN111055835B (en) Idle speed control method and system of hybrid power vehicle
JP2014165149A (en) Two-power supply load drive system, and fuel cell automobile
KR102598417B1 (en) Controlling method for heating of hybrid vehicle
JP3384349B2 (en) Vehicle control device
KR102496258B1 (en) Control method for driving motor of fuel cell vehicle
CN117207849B (en) Active heating control method for electric automobile, storage medium and electronic equipment
WO2019116585A1 (en) Fuel economy display control method and fuel economy display control system
CN112677776B (en) Power safety control method for range-extending system of range-extending electric automobile

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant